I18n Gremlins are sneaky issues that work their way into your code and foul up localization. They can be hard for developers to recognize.

I18n Gremlins

Those gremlins sneak up in your source code.

No Locale Framework

Issues: The king of all Gremlins: If the application does not have a locale framework, the Gremlin King rules and all Gremlins infest the application.
Remedy: Design a Locale Framework. How to detect, negotiate, persist, assign the locale for the application needs to be designed and implemented.